Do not sleep on Ajax, those dudes went so far ahead in champions league last year and they are playing Lille so I assume they will destroy them too, I would play either halves for them as well because they will probably score an early goal and then keep on attacking, Dutch football has always been focused on more attacks than defense so its a quite possible option to play 2.5 over as well.
Rest I agree with Harkorede, Liverpool will win, Barcelona will definitely will, Dortmund looks like a good team but we are talking about Barcelona here, yeah they had a big upset last year and lost 4-0 and got eliminated but even that was to eventual champions so its fine by me. Inter and Chelsea will be easy games and looking at their odds its not even that much of a shock.
I would really suggest not betting on todays matches based on past performances, neither Ajax nor Lille are the same teams they´ve been in the previous campaign, 100% "no bet" to me.
Ajax have changed a lot. They are in this season without de Ligt and F. de Jong which played a crucial role and helped Ajax reach semfinal. Still I think they won't have a problem winning against Lille at home. Lille are performing bad at away games at the moment while Ajax are on a 4-win streak at home.